Tank to tankless water heater swap
A leaking 15-year-old tank replaced with a wall-hung tankless unit, new venting, and a larger gas line.
- Tankless water heaters
- 5 h
- 2 technicians
Utility room, after the tankless unit and isolation valves went in
The job
A 15-year-old gas water heater had started to weep from the bottom of the tank. The family of five also ran out of hot water most mornings and wanted a unit that would keep up.
What we did
Two plumbers drained and removed the old tank, then checked the gas supply: the existing line was too small for the new burner, so it was upsized from the meter. The tankless unit went on the wall with new venting through the outside wall and isolation valves for yearly flushing. Every gas and water joint was tested before the unit was fired.
The result
Hot water now runs without a break through back-to-back showers, and the utility room has floor space again. The owner got the flushing steps and the warranty papers on the day.
“Three teenagers and nobody runs out of hot water any more. They showed me how to flush it once a year.”
Marco D. · Westfield Heights
Closed · Sep 9, 2026
- Old tank drained and taken away
- Gas line upsized for the new burner
- Tankless unit mounted on the wall
- New venting through the outside wall
- Isolation valves fitted for yearly flushing
- Gas and water joints tested for leaks
- Temperature set and handover with the owner
- Technicians: 2
- Time on site: 5 h
- Area: Westfield Heights
Job total$3,400
Fixed price, unit and removal included
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